Heat-exchange device



F. A. HALLECK.

HEAT EXCHANGE DEVICE.

APPLICATION FILED NOV. 28. 1917.

Patented D600 27, 1921.

2 SHEETS-SHEET l.

Patented: Dec. 27, 1921.

2 SHEEIS-QSHEE I 2- & N

F. A. HALLECK HEAT EXCHANGE DEVICE,

OO O O O On O OO O OO 0 APPLICATION FILED NOV; 28,1917.

ooooooooooooooo .llll'lll'lllll'I OOOOOOOOOOOOOOO 0000 0000 0000OOOOOOOOOOOOOOO OOOOOOOOOOOOOOO 0000 0000 0000 0000 0000 0000OOOOOOOOOOOOOOO FRANK A. time, or can PARK, rumors, ASSIGN'OR TO-suLLivAN' mncn'mmy comm, A. conrona'rron or mnssacnusnr'rs.

'r-E'xcHAN'GE DEVICE Specification of Letters Patent. Patented D643. 27,1921.

Application filed November 28, 1917. Serial'fio. 204,459.

Illinois, have invented certain new and usefnl Improvements inHeat-Exchange 'De-- vices, of which the following is a full, clear,

' which-is adapted to be driven from any suitand exact specification.

My invention relates to heat exchange devices, and more particularly tointercoolers for compressors.

It has for its object to cool the air used in a multi-stage compressorin an improved manner; A further object of my invention is to provide anintercooler having an improved construction and arrangement of air andcooling fluid passages whereby the cooling effect and the resultantefficiency of such a compressor is materially increased. A still furtherobject of my invention is to provide an intercooler of improved andsimplified construction wherein the cooling effect is greatly augmented,the air being brought into contactwith the cooling elements during itspassage throughout a materially extended path, and the cooling elementsthemselves being of an improved construction whereby a greatly increasedcooling surface is'rendered available. These and other ob jects andadvantages of my improvement will, however, hereinafter more .fullyappear.

In the accompanying drawings, I have shown for purposes of illustrationone embodiment which y invention may assume in practice, illustratingthesame as applied to use in connection with a well known type ofcompressor known as the an le compound, although itwill be understoothat my mvention is notlimited to use in conjunction I I and 15 areadapted to communicate, the

therewith.

In these drawings,- I Figure 1 is aside elevation showing such acompressor equipped 'with my improvement the intercooler casing beingbroken awa to facilitate illustration,

Fig. 2 is a detail'end elevation of the intercooling units;

In this illustrative construction, it will be observed that I have showna compressor of the angle compound type comprising a base 1 havingsuitable cylinders 2 and 3 disposed at r1ght angles to one another,suitable pistons 4 and 5 being movable in these cylinders and connectedto the usual crank shaft 6 able source and, as is customary, is providedwith a flywheel 7 As in the usual angle compound construction, theintercooler is located between the cylinders '2 and 3 in such a manneras to receive the air from the low pressure cylinder 2 and deliver thesame to the high pressure cylinder 3 after the same has been cooledduring its passage through the intercooler. In the constructionillustrated,'the intercooler casing is indicated at 8 as suitablysupported on the base 1 and connected through a suitable connection 9forming its air inlet, to the low pressure cylinder 2, and alsoconnected through a suitable passage 10 forming its 311" gischarge, tothe high pressure cylin- In my improved construction, it will beobserved that the intercooler casing 8 is substantiallyrectangular incross section and enlarged, in such a manner as materially to increasethe area available, at the same time that it is still possibleto'accommodate the intercooler compactly within the outlines between itstop and bottom, two of the same being herein shown at 11 and 12,whichare adapted to divide the-intercooler easing into a plurality ofcompartments 13, 14, and 15. As illustrated, these compartments 13, 14

10 through a suitable openingor' port 19. It

will also be observed that these several openings are arranged instaggered relationat opposite ends of the casin 8 in such a manner as toenable a fiow 0 air from the low pressure cylinder to. pass up into oneend of the compartment 15, and longitudinally thereof up through theopening 17 into the opposite end of the compartment l l, longitudinallyof that compartment to the other end thereof, up through the opening 18into the compartment 13, and longitudinally of that compartment to theoutward opening 19 leading to the discharge. 1 There are thus provided aplurality of parallel passes in series for the air to be cooled.Attention is also directed to the fact that in my improved constructionone end 20 of the casing 8 acts to permanently close one end of each ofthese compartments, while the other endsof the same are adapted to beclosed by the cooling units hereinafter described.

These units, as illustrated in Fig. 4, each comprise a series or bundleof small, longitudinally disposed, spaced tubes or pipes 21' so arrangedas to permit access of the air to practically their entire. area andalso to permit the flow of the cooling medium from one end of each unitdown through certain pipes thereof and back through other pipes to anoutlet point located adjacent its inlet.

More specifically, each of these units is shown to be provided with anend plate 22 perforated at 23 to permit fluid flow through the pipes andadapted to be attached over and close the open end of its compartment13, 14, or 15 when the unit is disposed 1ongitudinally in the same. Atits opposite end, each of these units is also provided with a smallerend member or header 24: adapted to be slipped into a compartment andlikewise provided with suitable openings 25 adapted to receive thepipes, this member 24, however, also being provided with a passage 26 toenable the cooling medium to pass out of one set of pipes and guide anddirect it into the other set for its reverse flow. In a preferred form,these the several pipes 21 as,

members 22 and 24 are each connected to for example, by slightlyexpanding the ends of the latter as is usual in ordinary boilerpractice. As shown, the several pipes are also spaced apart andconnected to the member 22 through a series of threaded longitudinallyextending bolts 27 operatively connected to a plurality of transverselydisposed bathe plates 28, perforated to permit the free passage of thepipes and the free longitudinal expansion and contraction thereof. Asshown, these plates 28 are spaced apart b short lengths of spacing pipes29, surroun ing the bolts 27, and are clamped in position by nuts 30 ontheir ends, the same being disposed in staggered relation at differentpoints along the length of the pipes 21 in such a manner as to cause theair passing from one end to the other of each compartment to take acircuitous path, alternately traveling over and under the dillerentbatanemia fies as it passesfrom the inlet or the compartment to theoutlet thereof. Cooperating with these baffles, it will also be observedthe cooling medium is passed longitudinally in opposite directionsthrough each compartment, finding an outlet at a point adjacent itsinlet, while the air to be cooled passes in a circuitous path througheach compartment in such a manner that it is brought intocontactthroughout an exceedinglylong path with practically every inch ofcooling area, and thus is effectually cooled.

In order to supply the cooling medium to the difierent pipes 21 of theseveral units and to enable the same to flow continuously from one setof pipes to the other and through the machine, it will be observed thatl have provided a pipe 32 extending from the water jacket 33 of the lowpressure cylinder up nearly to the level of'the top of the compartment13 and at a point adjacent the air inlet end thereof. There, it will beobserved that this pipe 32 communicates by means of a longitudinallyextending assageway 34- with an upper chamber 3% in a removablechambered cover plate 35 disposed over the open end oithe intercoolerand inclosing the end lates 22 of the several cooling units. Asillustrated, this plate 35 is provided with a plurality of spaced,horizontally disposed ribs 36 adapted to engage each ofthe plates 22 ata point intermediate its ends. Thus, it will be observed that when thecover 35 is clamped in position by suitable means, such as the clampingbolts 37, each unit is held securely in place and the cooling fluidtherefor is automatically divided in such a manner that a continuousflow may be obtained through the unit. As illustrated, these ribs 36also act to form a plurality of intermediate larger chambers 38 andanother smaller chamber 39, corresponding to the chamber at. Thischamber 39, as shown. in turn communicates by means of a passageway 39with a discharge pipe 40 leading to the water jacket 41 of the highpressure cylinder.

In the operation of my improved construction, it will be observed thatthe air from the low pressure cylinder is caused to pass into andlongitudinally of the compartment 15 into the opposite end of thecompartment 14, through that compartment,

and into the opposite end of the compartment'13, through which it passeslongitudinally to the opening 19 leading to the high pressure cylinder.During this travel of the air, it will also be observed that the same iscaused to passaround the several baffle plates 28 and 31 in such amanner as to bring the same in contact with each of the several coolingpipes 21 substantially throughout its length. It will also be observedthat the cooling fluid enters the intercooler at such a point that thesame when coldest is brought into contact with the air when the latterhas practically reached its minimum' temperature, andthat thereafter thegradually warming water is passed reversely along the stream ofgradually cooling air, finding an outlet at the point where the air iswarmest. Thus, it will be noted that the maximum cooling effect isobtainable, since, as the water even when it leaves the intercooleris'always cooler than the air entering the latter, it is enabled to acteffectively as a cooling agent at all points throughout its passagethrough the intercooler.

21 of relatively small cross section, it is possible to multiply thestreams of water passing through the intercooler and thus increase thecooling area available,. and that without in any way interfering withthe flow bf air therethrough.

As a result of my improvement it.has been found that not only is thetemperature of the air entering the high pressure cylinder materiallyreduced, but that as a result the efliciency of the compressorv has beenmaterially increased. By the use of my improved construction, whereinthe cool1ng elements are divided into units, it

' will. alsolbenoted that it is possible for the same to be very readilyassembled or removed when desired, any iinit being readily withdrawnwhenever the cover plate 35 is detached. Obviously, the different memebers going to make up each'of these units may also be very readilyassembled and cheaply manufactured, so thatat the same time that it ispossible to increase the capacity for a compressor of a given size, itis also possible to maintain a relatively low manufacturing cost; Theseand other ad'- vantages. of my improvement will, however, be clearlyapparent to those skilled in the art.'

While I have in this application specifically described one embodimentwhich my invention may assume in practice, it will be understood thatthe invention is not limited It will also be observed that through theuse of a large number of pipes ing 1. An intercooler comprising a casinghaving parallel superimposed communica ing compartments, each of whichcompartments is closed at one end and a co'oling unit carried in each ofsaid compartments thereof.

2. An intercooler comprising a casing and projecting the-reinto from theopen end having parallel superimposed compartments communicating withone another at their opposite ends, and a removable'cooling unit carriedin each of said compartments and providing for a circulation of coolingmedium in opposite directions therein.

3. An intercooler comprising a casing having a closed end'and a seriesofsuperimposed open .ended communicating compartments, and a cooling unitcarried in each compartment and closing the end thereof.

4. An intercoolencomprising a j casing having a plurality ofsuperimposedcommunicating compartments, and means for directing a cooling medium inopposite directions to each of said compartm-ents, said means comprisinga plurality of removable cooling units.

5. An intercooler comprising a casing having a closed end and a seriesof superimposed open ended communicating compartments, a cooling unitcarried in each compartment and closing the" end thereof,

and means for directing a cooling medium consecutively through saidunits. 7

6. An int-ercooler, a casing comprising a plurality of parallel.communicating air compartments, and means for cooling the airthereincomprising means for providing a series of finely divided.cooling streams passing consecutively through said com -v partmentsincluding a plurality of separately removable cooling units disposed onein each compartment.

7. An intercooler comprising a casing of substantially rectangular crosssection and having a plurality of parallel communicatcompartments formedtherein, and a plurality of cooling units disposed in saidcompartments,each comprising a series of spaced cooling tubes cooperating to form aunit of substantially rectangular cross section substantially fillingits compartment and each removable without removal of any other.

8. An in'tercooler comprising a casing having a closed end, transverselongitudinally extending ported partitions therein forming a series ofpasses connected with its il s

each other alternately at opposite ends, and a series of, cooling units,one in each pass,

comprising closure plates for-the ends of said compartments, coolingfluid vtubes 'secured in said closure plates, and headers slidablymounted in said compartments.

"9. An intercooler comprising 'a casing having "a closed end, transverselongitudi nally K extending ported partitions therein 11oforming'afseries of passes-connected with each other alternately at oppositeends and a series of coolingvnnits, one in each pass comprising closureplates for the ends of said compartments, cooling fluid tubes secured insaid; closure plates and headers slidab-ly mounted in saidcompartments,and a cover plate for the end of said intercooler opposite 'inletthereto, and separate cooling units in each of said compartments,

units beingarranged in series.

11, An intercooler comprising a casing having a closed end,longitudinally extending partitions in said casing dividing the sameinto a plurality of parallel compartments, said partitions beingprovided with I middle portions thereof.

said cooling snows? openings adjacent the opposite ends, of said casing,said openings being disposed at opposits, ends of adjacent partitions,cooling units located in each of said: compartments,

cooling units comprising plates closing said the open ends of saidcompartments, tubes secured in said plates andheaders with.

which said tubes oommunicate at their'opposite ends, and a front platefor said casing havin partition-ribs formed thereon, saidribs a uttingsaid end plates'adjacent the 12. An intercooler comprising a casinghaving a closed end, said casing being divided into a plurality ofparallel, serially arranged, counicating, open ended compartments bylongitudinally extended, ported-partition member, cooling units disposedin each of said compartments and each comprising a header freelyslidable 'in its respective compartment, a series of tubes communicatingwith said header, and a closure plate in which said tubes are mounted attheir opposite ends, said closure plate serving to close the open end ofsaid compartment, and baflles arranged in staggered relationwith respecttosaidcooling tubes and held in fixed relation with respect to saidclosure plate, and a cover plate at the end of said intercooler casing.opposite said closed end, said cover plate having transversely extendingpartitions formed thereon dividing the same into a series ofcomp-artmerits, said partitions being disposed adjacent the median linesof said closure plates whereby a reverse flow occurs in each coolingunit and a serial flow through the series thereof. a

In testimony whereof I affix, my signature. I FRANK A. HALLECK;

